Lathe attachement



R. HE'RVIG.

LATHE ATTACHMENT.

APPLICATION FILED Aue.24, T920.

1341325247 Patented Got. 1179 1922.

2 SHEETS-SHEET I.

E l ATTORNEY vR. HERVIG.

LATHE ATTACHMENT.

APPLICATION man Aue.24, 1920.

Patented Oct. T7, T922.

2 SHEETS-SHEET 2.

Patented @et l?, 1922.

RICHARD HERVIG, OIE CHICAGO, ILLINOIS, ASSIGNOR T0 AMERICAN CAR AND FOUNDRY COMPANY, OF NEW YORK, N. Y., A CGR-PORATION OF NEW JERSEY.

LATIIE ATTACHIEIENT.

Application filed August 24, 1920.

To all whom it may concern Be it known that I, RICHARD HERVIG, residing at Chicago, in the county of Cook and State of Illinois, and being a citizen of the United States, have invented certain new and useful Improvements in a Lathe Attachment, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertans to make and to use the same, reference being had to the accompanying drawings, which illustrate the preferred form of the invention, though it is to be understood that the invention is not limited to the exact details of construction shown and described, as it is obvious that various modifications thereof within the scope of the claims will occur to persons skilled in the art.

In said drawings:

Figure 1 is a view in section of my improved device shown attached to alathe, the machine head and tool support and operating means being shown in elevation;

Figure 2 is an end elevation;

Figure 3 is a plan view; and

Figure `4 is a section on the line 4-4 of Fig. 1.

It is the object 0f my invention to provide an improved device whereby a rotating work piece may be cut to an ova-l or elliptical cross section.

A further object is to provide an improved operating means for a device of the type described whereby a cutting tool is shifted to engage with the work when the work is shifted so as to be cut to an oval or elliptical cross section.

In the drawings, which show a modiication of the device disclosed in my Patent No. 1,256,131, issued February 12, 1918, 1

designates the head and 2 the head spindle of the lathe or other machine to which my device is attached. The device itself comprises a tubular member 3 interiorly threaded for attachment to the spindle 2 and provided with recesses or keyways in which are placed the segmentally shaped keys 4, 4 and with diametrically opposed longitudinal guideways or faces 5. 5 disposed angularly to the axis of the member 2. Surrounding the tubular member 3 and loosely fitting the spindle 2 is a tubular member 6. The member 6 comprises a shell open at one end and provided at its other end with an end wall Serial N0. 405,757.

7 having an outwardly extending annular projection 8 about the centrally located opening in the end wall 7. The shell of the member 6 is outwardly cylindrical but internally is eccentric to the axis of the member 6 in two directions whereby the inner surface of the member 6 contacts only with diametrically opposite arcuate portions of member 3, member 6 being, therefore, displaceable in opposite directions transversely of the inner tubular member 3. The member 6 is provided with slots adapted to register with the keyways of member 2 so that keys 4 when driven through the slots of member 6 and the keyways of member 3 will secure the members together.

l/Vith the members 3 and 6 so keyed to gether, they are held against relative longi tudinal movement and the faces of the keys 4 which form the chords of the key segments form tracks bearing on the bottoms of the keyways in the tubular member 3. As the member 6 loosely surrounds the member 3, this arrangement of the keys allows the member 6 to be guidedly slid transversely of the spindle2 and the inner member'3. It will be seen that the keys 4 will be rotated because of their engagement in the keyways of member 3 and will in turn rotate the member 6.

Surrounding the member 6 and slidable longitudinally thereof is an annulus 9 provided on its outer surface with an annular projection 10. Diametrically opposed countersunk holes in the annulus 9 receive screws 11 which pass through the annulus 9 and project into longitudinal slots 12 in the member 6 which register with the guideways 5 on the member 3.

Before the annulus is slipped over the member 6, guide blocks 13 are positioned in the slots 12 in the member 6 so as to bear against the guideways 5 and slide longitudinally thereof. These guide blocks 13 are secured tothe annulus 9 by the screws 11 and move with said annulus. Surrounding the annulus 9 is a divisible coupling ring comprising sections 14 and 15 joined together'by bolts 16 in the lugs 17 and 18 at the ends of the respective ring sections. The sections 14 and 15 secure the inwardly extending rings 19 and 2O which serve to confine the balls 21 which bear against the annular projection 10 on the annulus 9 thus forming a bearing which permits the annulus 9 to rotate `freely While the coupling ring is held against rotation.

Mounted in the opening in the end Wall 7 of the member 6 is a tubular member 22 having an inner Wall, cylindrical for part ot' its length and tapering inwardly for the remainder- Mounted in the member 2,2 and adapted to slide therein is a collet 23 having a projecting ring 24` at one end engaglo ing the cylindrical portion of the Wall and tapered at the other end to engage the ta pering portion of the Wall. The collet 23 is split into several pieces for the greater portion of its length so. that upon being forced into engagement with the tapering portion oll the Wall the parts of the'collet will be forced together and serve to grip the Work piece. Between the collet 23 and the plunger 25 is the tubular memberv 26 having a ball and socket engagement with the collet 23 and with the plunger 25, the plunger being` operated in the usual manner vto force the collet 23 forward to. grip the Work or to, permitof the collet 23beingre 25 tracted to release the Work. Mounted in the member 26 is the tubular guide member 27 having an enlarged head portion 28 that limits its insertion in the member 27. rflireaded on to the annular ring 8 is the 30vi`ace plate 29 provided with a projecting ring portion 3,9 that lits over the annulus 9 and serves to protect the interior ot the chuck. Threaded. into the sections 14 and l5 of the coupling ring are the projecting 35. pins 31 and 32 provided With bushings 33 'adapted to engage in irregular slots 34 in the cross pieces 3,5 and 36 ot the cross slide and in the` slots 3.7 in the members 38 and 3.9 bolted to the machine head. .As yshown in 40 Fig. 3 the slots in the cross pieces 35 and 36 comprise central portions angularly disposed With respect to the longitudinal axes of the` cross pieces and end portions parallel to the longitudinal axes and disposed on each side thereot While the slots 37 in the members 3:3; and 3,9 are parallel to thev aXis oil the spindle 2. rlhe ends ot the cross pieces 35. and 36 are spaced apart by the upright tubular pieces 40-and 41 at the ends ot the arms 42 and 43 projecting` from the base piece 44 of the cross slide. Bolts 45 passing` through the cross pieces 3.5 and 36 and the upright pieces 40 and-41 secure the cross pieces to the arms 42 and 43. The 5.5 base piece 44 is adapted to slide, transversely of the machine bed, in a guide piece 46 mounted on the machine bed and is provided with a rack 47 engaged by a pinion 43 mounted on a shaft 49 that is rotated by 6,0 means of a handle 50. Integral with the base piece 44 are the standards or tool supports 51 and 52 which carry the cutting tools 53 and 54 secured to the standards by the bolts 55.

In operation, rotation of the pinion 48 by means of the handle 50 will cause the cross slide, by means of rack 47, to move across in front of the chuck bringing one or the other of the tools 53 and 54 intol engagement` with the Worlv piece 5.6 held by the chuck. It Will', at the same time, 'move the slotted cross pieces 35 and 36 transversely ot the machine head causing the slots` 34, by engagement with the pins 31 and 32, to move the pins 31 and 32 longitudinally of the machine head in the slots in the guide pieces 33 and 39 bolted to the machine head. carry with themv the divided couplingl ring` which, through its engagement With the annular' ring 10, operates the sliding annu-v lus 9 and the guide blocks 13 longitudinally the chuch. Movement of the guide. blocks 13 along the guide faces Will cause the guide blocks and annulus 9 to be shifted transversely of the chuck carrying With them the collet 23 and the Work piece 56 mounted therein thus shifting the collet 23. and Work piece 56 so that their axes will lie to one sid-e of the axis of the spindle 2 and will be rotated around the axis of spindle. 2 when the spindle is rotated. Operation of' the handle 50 so as to move the` crossslidel in the opposite direction Willl bring the other cutting tool toward the Work piece and will, at the same time, operate` the pins 31 and 32.y through their engagement in the slots 34,. in the opposite direction in the slots 37 thus moving' the annulus 9 and'guide` blocks 13 in the opposite direction and shifting the collet 231 and yvorlr piece56 so that their axes will lie on the opposite sidei of the axis of spindle 2, Moving the cutting tools tov a position in which they are equally spaced *trom the Work piece will positionA the collet and Work piece With their aXesin line With the axis ot spindle 2. The shifting ot the. tools and the collet can be done Without stopping the machine.

`Whatl claim is :r

1. ln a device of the class described, a machine spindle, a Work holder carried by said spindle, a support for a tool engaging the work carried by said holder and an operating means for said. tool support adapt' ed to position said Work holder eccentric to said machine spindle.

In a device. of the class described. a plurality of tool supports, a Work holder and an operating means adapted to simultaneously shift Vsaid Work holder and move one tooli'support tom-ard and the other'tool supportaway from the Work holder.

3. lin a device of the class 4deseribedQa machine spindle, a Work holder carried by said spindle, a plurality of tool supports and operating means for said tool supports adapted to reciprocate said ytool supports and to. shift said Workholder from one position eccentric of said spindle to another'.-

The pins 31 and 32` 4c. In a device of the class described, a cross slide, a tool support carried by said slide, a machine spindle, a collet chuck carried by the machine spindle and a connection between said slide and said chuck adapted to move the collet eccentric to said spindle when said tool support is moved toward said chuck.

5. In a device of the class described, a cross slide, a tool support carried by said cross slide, cross pieces operated by said cross slide, a machine spindle, a collet chuck carried by said machine spindle, sliding means adapted to position said collet eccentric to said machine spindle and a connection between said sliding means and cross pieces adapted to operate said sliding means simultaneously with said tool support.

6. In a device of the class described, a machine spindle, a work holder1 carried by said spindle, a tool support, a carrier or said tool support and a connection between said carrier and said work holder adapted to shift said work holder eccentric to said machine spindle and said carrier transversely of the machine simultaneously.

7. In a device of the class described, a machine spindle, a member secured to said spindle, a sleeve mounted on said member for movement transversely thereof, a collet carried by said sleeve, a tool support, a carrier for said tool support and a connection between said carrier and said sleeve adapted to operate said collet and tool support simultaneously.

8. In a device of the class described, a machine spindle, a member secured to said spindle, a sleeve mounted on said member or movement transversely thereof, a collet carried by said member, a plurality of tool supports, a carrier adapted to reciprocate said tool supports and a connection between said carrier and said sleeve adapted to move said sleeve in different directions as di'derent tool supports are moved toward the collet.

9. In a device of the class described, a cross slide, a plurality of tool supports carried by said slide, a machine spindle, a collet chuck carried by the machine spindle and a connection between said slide and chuck adapted to move said collet eccentric to said spindle in one direction when one tool support is moved toward said chuck and to move said collet eccentric to said spindle in another direction when another tool support is moved toward said chuck.

10. In a device of the class described, a cross slide, a machine head, a spindle carried by said head, a chuck carried by said spindle and having a collet adapted to be moved transversely of said spindle, slotted members carried by said head and said cross slide and pins carried by said chuck and engaged in the slots of said members to 0perate said collet.

ll. In a device ol' the class described, a machine spindle, a member secured to said spindle, a sleeve surrounding said member and adapted to be moved transversely thereof, an annulus movable longitudinally of said sleeve and adapted to operate said sleeve and a face plate carried by said sleeve and havino' a portion surrounding said annulus.

12. In a device of the class described, a machine spindle, a member secured to said spindle, a sleeve surrounding said member and adapted to be moved transversely thereof, a tubular member carried by said sleeve, a collet mounted to reciprocate in said tubular member, a push rod mounted in said spindle and a iicXible connection between said collet and said push rod.

13. In a device of the class described, amachine spindle, a member secured to said spindle, a sleeve surrounding said member and adapted to be moved transversely thereof, a tubular member carried by said sleeve, a collet mounted to reciprocate in said tubular member, a push rod in said spindle and a member connecting said push rod and said collet and having a ball and socket engagement therewith.

141-. In a device of the class described, a machine spindle, a member secured to said spindle, a sleeve mounted on said member for movement transversely thereof, a tubular member carried by said sleeve and a collet mounted to reciprocate in said tubular member.

15. In a device of the class described, a machine spindle, a push rod therein, a chuck carried by said spindle and having a collet therein and a connection between said collet and said push rod adapted to permit said collet being positioned eccentrically of said push rod.

16. In a device oit' the class described, a machine spindle, a push rod therein, a chuck driven by said spindle and comprising a collet adapted to be positioned eccentrically of said spindle and a connection between said collet and said push rod having` a ball and socket engagement therewith.

In witness whereof I have hereunto set my hand in the presence ot two witnesses.

RICHARD HERVIG.

W'itnesses:

I-I. PADGETT, F. H. Grens. 

